Pneumatic wrench convenient to install

Abstract

The utility model provides a pneumatic wrench convenient to install, and belongs to the technical field of pneumatic wrenches. The pneumatic wrench solves the problem that in the prior art, a pneumatic wrench sacrifices the size and the weight for facilitating structural strength. The impact wrench comprises a wrench shell, a striking assembly and an air cylinder assembly, the wrench shell comprises a main body part and a handle part, the main body part is integrally formed, a through mounting cavity is formed in the main body part, the front side of the main body part is narrowed to form a narrowing hole, the narrowing hole is communicated with the mounting cavity, and the striking assembly comprises an anvil block, an impact frame, a striking block and a positioning pin. The anvil block penetrates through the center of the impact frame, the positioning pin is connected with an impact frame body, the striking block is fixedly connected with the positioning pin, the striking block is connected with the anvil block, the air cylinder assembly comprises an air cylinder body and a front end cover, the front end cover is fixedly connected with the front side of the air cylinder body, and the front side of the front end cover is fixedly connected with a driving cam. One end of the driving cam extends into the impact frame and is connected with one end of the anvil block. The utility model has the advantages of convenient installation and higher structural strength.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic wrench technology and relates to a pneumatic wrench that is easy to install. Background Technology

[0002] In the existing technology, the striking component and cylinder component of most pneumatic wrenches are installed separately. In order to ensure the connection strength, the separate installation structure often requires additional support or reinforcing ribs, resulting in an increase in overall size and weight.

[0003] Chinese patent CN213081259U discloses a pneumatic wrench, including a housing for accommodating a pneumatic motor and a gun body rear cover that can be fixedly connected to the pneumatic motor. The lower end of the housing is formed with a hand grip. The gun body rear cover is embedded in the rear end of the housing. The outer side wall of the gun body rear cover is fused to the inner side wall of the housing. A first air inlet formed on the housing communicates with a second air inlet formed on the gun body rear cover. An impact frame that can rotate with the rotor of the pneumatic motor is provided on the front side of the pneumatic motor. The impact frame has a receiving cavity for accommodating a striking block and a main shaft. Two grooves are arranged opposite each other in the receiving cavity. One side of the striking block is formed with a semi-cylindrical protrusion that mates with the groove. The other side of the striking block is provided with a concave arc groove. A matching limiting pin is fixed in the other groove.

[0004] The patent provides a pneumatic wrench in which the outer shell and the rear cover of the gun body are fused together on the outer side wall, but in essence they are still separate installation structures. In order to ensure the connection strength between the two and the stability of the whole operation, the main body of the shell and the front body are connected by four pins, which limits the further reduction of the overall volume and the weight reduction. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a pneumatic wrench that is easy to install.

[0006] The objective of this utility model can be achieved through the following technical solution: A pneumatic wrench that is easy to install includes a wrench housing, an impact component, and a cylinder assembly. The wrench housing includes a main body and a handle. The main body is integrally formed and has a through mounting cavity inside. The front side of the main body narrows and forms a narrowing hole, which communicates with the mounting cavity. The impact component includes an anvil, an impact frame, an impact block, and a positioning pin. The anvil passes through the center of the impact frame. The positioning pin is connected to the frame body of the impact frame. The impact block is fixedly connected to the positioning pin and to the anvil. The cylinder assembly includes a cylinder body and a front end cover. The front end cover is fixedly connected to the front side of the cylinder body. A drive cam is fixedly connected to the front side of the front end cover. One end of the drive cam extends into the impact frame and is connected to one end of the anvil.

[0007] In one of the aforementioned easy-to-install pneumatic wrenches, a valve chamber is provided at the lower end of the main body, a reversing valve is installed inside the valve chamber, and an exhaust cover is fixedly connected to the wrench housing on one side of the valve chamber.

[0008] In the aforementioned easy-to-install pneumatic wrench, the end of the mounting cavity is provided with several connecting holes in the circumferential direction, the rear of the main body is connected with a rear housing cover, and the rear of the mounting cavity is provided with a rigidity reduction groove.

[0009] In one of the aforementioned easy-to-install pneumatic wrenches, a sleeve is fitted onto the anvil, and the sleeve is located within a narrowing hole.

[0010] Compared with the prior art, the pneumatic wrench provided by this utility model has the following advantages: 1. The main body is integrally molded and has a through mounting cavity inside, providing a direct and regular assembly space for the striking component and cylinder component, reducing complex splicing steps, and enabling each component to be quickly positioned and installed. The front end cover of the cylinder component is pre-fixed to the cylinder body, and the drive cam is also fixed on the front side of the front end cover, forming a modular structure that can be directly installed into the mounting cavity of the main body, reducing the assembly difficulty of scattered parts; 2. The integral molding process of the main body eliminates splicing gaps, improves the integrity and impact resistance of the shell, effectively copes with the high-frequency vibration and impact force when the pneumatic wrench is working, and extends its service life. The enclosed design of the internal components in the main body also makes each component form a stable whole after installation, improving the rigidity and reliability of the pneumatic wrench. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the wrench housing structure;

[0014] Figure 4 This is a schematic diagram of the connection structure between the impact component and the cylinder component.

[0015] In the diagram: 1. Wrench housing; 11. Main body; 12. Handle; 13. Mounting cavity; 14. Narrowing hole; 15. Valve cavity; 16. Connecting hole; 17. Rigidity reduction groove; 2. Impact assembly; 21. Anvil; 22. Impact frame; 23. Impact block; 24. Positioning pin; 25. Sleeve; 3. Cylinder assembly; 31. Cylinder body; 32. Front end cover; 4. Drive cam; 5. Reversing valve; 6. Exhaust cover; 7. Rear housing cover. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 4 As shown, this embodiment includes a wrench housing 1, which is composed of a main body 11 and a handle 12. The main body 11 is integrally molded and has a through mounting cavity 13 inside. The front side of the main body 11 narrows to form a narrowing hole 14, and the narrowing hole 14 is connected to the mounting cavity 13 to provide a regular assembly space for the internal components.

[0018] like Figures 1 to 4 As shown, the striking assembly 2 includes an anvil 21, an impact frame 22, a striking block 23, and a positioning pin 24. The anvil 21 passes through the center of the impact frame 22. The positioning pin 24 is fixedly connected to the frame of the impact frame 22. The striking block 23 is fastened to the positioning pin 24 and contacts and engages with the anvil 21 to ensure the stability and transmission efficiency of the striking action. The cylinder assembly 3 includes a cylinder body 31 and a front cover 32. The front cover 32 is fixedly connected to the front side of the cylinder body 31 by bolts. The front side of the front cover 32 is fixedly connected to a drive cam 4. One end of the drive cam 4 extends into the impact frame 22 and precisely docks with one end of the anvil 21 to realize the transmission of cylinder power to the striking assembly 2.

[0019] To elaborate further, such as Figures 1 to 3 As shown, a valve chamber 15 is provided at the lower end of the main body 11. A reversing valve 5 is installed inside the valve chamber 15 to control the airflow direction and adjust the working state of the wrench. An exhaust cover 6 is fixedly connected to the wrench housing 1 on one side of the valve chamber 15 by screws or clips to facilitate the discharge of exhaust gas from the chamber and ensure smooth airflow. Several connecting holes 16 are evenly provided around the end of the mounting cavity 13. The rear side of the main body 11 is connected to the rear housing cover 7 by bolts and connecting holes 16, which is convenient for disassembly and assembly. A rigidity reduction groove 17 is provided on the rear side of the mounting cavity 13 to reduce the weight of the housing and improve the overall strength by optimizing the structure, thus avoiding stress concentration.

[0020] To elaborate further, such as Figure 2 As shown, a sleeve 25 is fitted on the anvil 21. The sleeve 25 is located inside the narrowing hole 14. The narrowing hole 14 can position the sleeve 25 to ensure its coaxiality with the anvil 21, which facilitates quick assembly and precise operation.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A pneumatic wrench for easy installation, comprising a wrench housing (1), a striking assembly (2) and a cylinder assembly (3), the wrench housing (1) comprising a main body portion (11) and a handle portion (12), characterized in that: The main body (11) is integrally formed and has a through installation cavity (13) inside, the front side of the main body (11) is narrowed and has a narrowed hole (14) formed, the narrowed hole (14) is communicated with the installation cavity (13), the striking assembly (2) comprises an anvil (21), an impact frame (22), a striking block (23) and a positioning pin (24), the anvil (21) is arranged through the center of the impact frame (22), the positioning pin (24) is connected with the frame body of the impact frame (22), the striking block (23) is fixedly connected with the positioning pin (24) and connected with the anvil (21), the cylinder assembly (3) comprises a cylinder body (31) and a front end cover (32), the front end cover (32) is fixedly connected with the front side of the cylinder body (31), the front end cover (32) is fixedly connected with a driving cam (4) at the front side, one end of the driving cam (4) extends into the inside of the impact frame (22) and is connected with one end of the anvil (21).

2. The pneumatic wrench of claim 1, wherein: The main body (11) is integrally formed and has a through installation cavity (13) inside, the front side of the main body (11) is narrowed and has a narrowed hole (14) formed, the narrowed hole (14) is communicated with the installation cavity (13), the striking assembly (2) comprises an anvil (21), an impact frame (22), a striking block (23) and a positioning pin (24), the anvil (21) is arranged through the center of the impact frame (22), the positioning pin (24) is connected with the frame body of the impact frame (22), the striking block (23) is fixedly connected with the positioning pin (24) and connected with the anvil (21), the cylinder assembly (3) comprises a cylinder body (31) and a front end cover (32), the front end cover (32) is fixedly connected with the front side of the cylinder body (31), the front end cover (32) is fixedly connected with a driving cam (4) at the front side, one end of the driving cam (4) extends into the inside of the impact frame (22) and is connected with one end of the anvil (21).

3. The pneumatic wrench of claim 1, wherein: The main body (11) is integrally formed and has a through installation cavity (13) inside, the front side of the main body (11) is narrowed and has a narrowed hole (14) formed, the narrowed hole (14) is communicated with the installation cavity (13), the striking assembly (2) comprises an anvil (21), an impact frame (22), a striking block (23) and a positioning pin (24), the anvil (21) is arranged through the center of the impact frame (22), the positioning pin (24) is connected with the frame body of the impact frame (22), the striking block (23) is fixedly connected with the positioning pin (24) and connected with the anvil (21), the cylinder assembly (3) comprises a cylinder body (31) and a front end cover (32), the front end cover (32) is fixedly connected with the front side of the cylinder body (31), the front end cover (32) is fixedly connected with a driving cam (4) at the front side, one end of the driving cam (4) extends into the inside of the impact frame (22) and is connected with one end of the anvil (21).

4. The pneumatic wrench of claim 1, wherein: The main body (11) is integrally formed and has a through installation cavity (13) inside, the front side of the main body (11) is narrowed and has a narrowed hole (14) formed, the narrowed hole (14) is communicated with the installation cavity (13), the striking assembly (2) comprises an anvil (21), an impact frame (22), a striking block (23) and a positioning pin (24), the anvil (21) is arranged through the center of the impact frame (22), the positioning pin (24) is connected with the frame body of the impact frame (22), the striking block (23) is fixedly connected with the positioning pin (24) and connected with the anvil (21), the cylinder assembly (3) comprises a cylinder body (31) and a front end

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